How to move form one server to another?

[AlexAung]

I have hosted Revive ad server on server A and i want to move to server B. So that I backup dump data-back.sql and copy the whole /var/www/html folder and restore and replace on server B. But I got following error. I have no idea what it is wrong. I am sure that restore database is successfully. replace html is also no issue. I can se the domain.config.php in var folder. May I know how to back up the server to move to another server. Thanks.

Alex

Fatal error: Uncaught Error: Call to undefined method MDB2_Error::quoteIdentifier() in /var/www/html/lib/OA/Upgrade/VersionController.php:34 Stack trace: #0 /var/www/html/lib/OX/Plugin/ComponentGroupManager.php(1323): OA_Version_Controller->init(Object(MDB2_Error)) #1 /var/www/html/lib/OX/Plugin/ComponentGroupManager.php(1962): OX_Plugin_ComponentGroupManager->_getVersionController() #2 /var/www/html/lib/OX/Plugin/ComponentGroupManager.php(1943): OX_Plugin_ComponentGroupManager->getSchemaInfo('') #3 /var/www/html/lib/OX/Plugin/ComponentGroupManager.php(1888): OX_Plugin_ComponentGroupManager->getComponentGroupInfo('oxHtml') #4 /var/www/html/lib/OX/Plugin/PluginManager.php(939): OX_Plugin_ComponentGroupManager->getComponentGroupsList(Array) #5 /var/www/html/lib/OX/Plugin/PluginManager.php(1018): OX_PluginManager->getPackageInfo('openXBannerType...') #6 /var/www/html/lib/OX/Extension/ExtensionCommon.php(84): OX_PluginManager->getComponentHooks() #7 /var/www/html/lib/OX/Admin/UI/Install/InstallController.php(147): OX_Extension_Common->cacheComponentHooks() #8 /var/www/html/lib/OX/Admin/UI/Install/InstallController.php(619): OX_Admin_UI_Install_InstallController->initInstallStatus(true) #9 /var/www/html/lib/OX/Admin/UI/Controller/BaseController.php(97): OX_Admin_UI_Install_InstallController->restartAction() #10 /var/www/html/lib/OX/Admin/UI/Controller/BaseController.php(111): OX_Admin_UI_Controller_BaseController->execute('restart') #11 /var/www/html/lib/OX/Admin/UI/Install/InstallController.php(217): OX_Admin_UI_Controller_BaseController->forward('restart') #12 /var/www/html/lib/OX/Admin/UI/Controller/BaseController.php(97): OX_Admin_UI_Install_InstallController->indexAction() #13 /var/www/html/lib/OX/Admin/UI/Controller/BaseController.php(85): OX_Admin_UI_Controller_BaseController->execute('index') #14 /var/www/html/www/admin/install.php(41): OX_Admin_UI_Controller_BaseController->process(Object(OX_Admin_UI_Controller_Request)) #15 /var/www/html/www/admin/install.php(30): Installer->startMVC() #16 {main} thrown in /var/www/html/lib/OA/Upgrade/VersionController.php on line 34

I forgot to change the new database host name.